Nut and pipe wrench.



PATENTED JUNE 80, 1908.

D. STEWART.

NUTAND PIPE WRENCH.

APPLIOATIOH FILED 00T.3. 1904.

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UNITED STATES PATENT OFFICE.

DAVID STEWART, OF SOHENECTADY, NEW YORK, ASSIGN OR TO STEWART WRENCH AND MANUFACTURING COMPANY, OF ALBANY, NEW YORK, A CORPORATION OF NEW YORK.

NUT AND PIPE WRENCH.

Specification of Letters Patent.

Patented June 30, 1908.

Application filed October 3, 1904. Serial No. 226,888.

To all whom "it may concern:

Be it known that I, DAVID STEWART, a subject of the United Kingdom of Great Britain and Ireland, residing at No. 305 Steward Place, in the city of Schenectady, in the county of Schenectady, in the State of New York, United States of America, have invented a certain new and useful Improvement in Nut and Pipe Trenches, of which the following is a specification, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of my invention is to provide a nut or pipe wrench of the rock-jaw-type of a simple and cheap form of construction, so made as to be of light weight, and with great variability of jaw-width, yet of exceeding compactness, and easily and quickly changed as to jaw-width by one hand, wherein the same may be quickly and easily disassembled and resolved into its component parts, and as quickly and easily reassembled and put together again with all worn or broken parts replaced by new ones.

To such ends my invention consists in substance of a slide-bar and handle-piece formed in one piece provided at one end with a removable jaw-head usually corrugated to grip the nut or pipe, a slide-piece or sleeve upon the slide-bar, a jaw-piece having a jawhead similar to the j aw-head of the slide-bar pivoted to the slide-piece or sleeve, a screwthreaded passage through the slide-piece or sleeve in alinement with a plain screw-passage formed between the slide-bar and jawpiece, an adjusting screw working in the threaded passage of the slide-piece or sleeve having a thumb-nut lying in a slot formed below two side-prongs at the upper end of the handle-piece portion of the slide-bar and handle, two cheeks or prongs forming extensions of the slide-bar handle-j aw extending backward one on either side of the pivoted j aw-piece to prevent side-motion thereof, and a bow-spring located at the heel of the pivoted j aw-piec'e adjacent to the pivot and normally forcing the heel away from the slidepiece or sleeve, for forcing the free end of the jaw-piece toward the slide-bar jaw head; although it is not to be understood that the invention is necessarily limited to a device comprising at once all of the elements before enumerated, as the same consists in the particular construction of certain devices and parts, and the particular construction, combination and arrangement of certain devices and parts, all as hereinafter more particularly set forth in the specification, and pointed out in the claims.

My said invention is fully set forth in the following specification of which the accompanying drawing forms a part, wherein simiar numerals of reference designate like or equivalent parts wherever found throughout the several views, and in which Figure 1 is a side view of one form of my improved wrench. Fig. 2 is a like view of such wrench, a portion thereof being shown in longitudinal section in order to better show the construction; Fig. 3 is a detail view in perspective of the form of sliding piece or sleeve shown in Fig. 1 Fig. 4 is a detail View in perspective of the bow-spring used in my improved wrench Fig. 5 is a side view in central section of the top of the slide-bar and removable jaw-head, of a slightly modified form of construction from that shown in Figs. 1 and 2, and Fig. 6 is a view similar to that shown in Fig. 4 of another manner of se curing the jaw-head to the slide-bar which may for purposes of cheapness advantagcously be used.

Referring to the drawing :The reference numeral 11 designates a slide-bar provided at one end with the handle 12, preferably formed integral therewith, at the unction of which handle and slide-bar is located on the rear side two prongs 13, leaving between them an open ended slot in which rests the adjusting screw 14 the milled-actuatingthumb-nut 15 of which rests in a thumb-nutslot 15 formed in the handle 12 immediately below the prongs 13, and secured in any desired manner upon the slide-bar 11 at the end is the enlarged jaw-head 16, usually provided with the serrations or teeth 17 in order to better grip the nut or pipe, which j aw-head has extending therefrom in the same direction as do the prongs 13, the jaw-head prongs 18 which extend over the bar 19 of the pivotedjaw-piece 20 which is provided with the enlarged j aw-head 21 coacting with the jaw-head 16, and like it is provided with serrations or teeth 17.

Sliding easily up and down the slide-bar 11 is the slide-piece or sleeve 21, Which is for the sake of lightness usually provided with the perforations 22.

The pivot-point upon which the jaw-piece 20 rocks consists of a in or bolt 26, which may be and preferab y is formed with a screw-thread upon a portion thereof and a slotted head 27 as shown in Fig. 1, so as to be easily removable, or it may be in the form of a plain pin riveted down or upset at the ends, and such pivot-pin or bolt 26 of whatever form passes through the two side-wings 27 of the pivoted-jaw-piece 20 the rounded fore ward ends of which wings fit into similarly shaped sockets in the slide-piece or sleeve 21 the rocking movement of the jaw-piece on its pivot-pin being limited by the contact of the square rear bottom portion 28 thereof with the flat upper face of the rear bottom shelf 29 of the slide-piece, when moved in the loosening or non-working direction, and by the meeting of the abutting fiat faces 30 of the slide-piece or sleeve and 31 of the jawpiece, when moved in the working direction so as to grip the nut or pipe.

Formed in and through the central portion of the slide-piece or sleeve 21 is a threaded adjusting screw hole 32 in which rests and rotates, so as to slide such slide-piece up and down the slide-bar 11, the adjusting screw 14, and, as the main portion of the strain when the wrench is operated comes not on the bolt or pin 26 but on the abutting square surfaces 30 and 31, a very small pin or bolt may be used.

The enlarged j aw-head is as before-stated secured to the slide-bar 1 1 in any desired manner and may be of various forms and when of that shown in Figs. 1, 2 and 5, and the pins or bolts 26 and 26 are of screw form, it will be seen that by merely removing these two screws by an ordinary screw-driver the entire wrench may be taken apart in a moment and worn or broken parts immediately renewed. And by this construction it will be seen that a device in the end the most durable by reason of such interchange, will be obtained.

The securing bolts whether single as shown in Figs. 1, 2 and 5 or multiple or plural as shown in Fig. 6 may be either in the form of screws or plain rivet bolts, as may be desired, and the removable jaw-headupon the slidebar 11 may be recessed as shown in Fig. 5 or merely slotted as shown in Fig. 6. However I prefer the construction of head shown in Fig. 6, for the reason that the same can be slotted in gang, thus much cheapening the construction. In order to throw the pivotpin 26 sufiiciently far to the rear and to add strength to lightness the pivoted jaw-piece 20 is provided with the off-set or rearwardly extending portionv45 and the slide piece 21 to which the same is pivoted with the downwardly extending off-set portion 46, and it will at once be seen by a glance at the drawing that only by this peculiar construction can the great desideratum of extreme strength witha minimum of weight of these two parts be at the same time secured.

While any form of spring may be used to normally throw the pivoted-jaw forward, I prefer to use a bow-spring 40 of the form shown, which fits into a recess 0r recesses 41 formed half in the heel of the pivoted j awpiece and half in the heel of the slide-piece 21, the outer ends of such recess in each case having the square shoulders 42 to receive the ends 40, of such spring 40 when once placed in position, as shown in Fig. 2. And it will be seen that with a spring of this form should the same break the broken parts could be removed and a new spring placed in position, almost instantaneously without any disturbance of the parts of the wrench; it only being necessary to pry out the broken spring and push into position the new spring far enough to allow the ends thereof to fly by natural resiliency back into position behind the shoulders 42.

Having now fully described my said invention, what I claim, and desire to secure by Letters Patent is 1. In a wrench a slide-bar having an integral handle-piece, a jaw-head at the end of the slide-bar, prongs extending rearward from the two sides of the slide-bar jaw-head so as to extend over the bar of the pivoted jawiece, a slide-piece or sleeve sliding on the slide-bar, a jaw-piece pivoted to the slidepiece or sleeve, an adjusting screw working in a thread in the slide-piece or sleeve and lying in the space between the slide-bar and the jaw-piece, a chamfer or recess formed in the heel of the slide-piece or sleeve closed at the outer end by a suitable shoulder, a like chamfer or recess also having a similar shoulder formed in the heel of the pivoted jawpiece so as to abut against the recess in the sleeve, and a bow spring located in the cavity kept from outward displacement by abutment of the ends against the shoulders.

2. In a wrench, a slidebar, a handle formed integral with the slide-bar, a slide piece reciprocating on the slide-bar having a central fin on the rear-side flanked by recesses rounded at the forward ends bearing substantially straight upper and lower walls at the rear open sides thereof, a lower backward extension or offset at the fin end of the slide-piece, and a pivoted jaw-piece having a lower backward extension or offset pivoted to the fin and adapted to rock upon its pivot pin having a lower face coacting with theupper face of the offset of the slidepiece to limit the rearward rocking movement thereof.

3. In a wrench, a slide-bar, a handle formed integral with the slide-bar, a slidepiece reciprocating on the slide-bar having a central fin on the rear-side flanked by recesses rounded at the forward ends bearing substantially straight upper and lower walls at the rear open sides thereof, a lower backward extension or offset at the fin end of the slidepiece, a pivoted jaw-piece having a lower backward extension or offset pivoted to the fin and adapted to rock upon its pivot pin having a lower face coacting with the upper face of the offset of the slide-piece to limit the rearward rocking movement thereof, and an adjusting screw lying between the slidebar and aw-pieee.

4. In a wrench, a slide-bar, a jaw-head removably secured to the outer end of the slide-bar, a handle-bar, a slide-piece reciprocating on the slide-bar having a central fin on the rear-side flanked by recesses rounded at the forward ends bearing substantially straight upper and lower walls at the rear open sides thereof, a lower backward. extension or offset at the fin end of the slide-piece, and a pivoted jaw-piece having a lower backward extension or offset pivoted to the fin and adapted to rock upon its pivot pin having a lower face coacting with the upper face of the offset of the slide-piece to limit the rearward rocking movement thereof.

5. In a wrench, a slide-bar, a jaw-head reinovably secured to the outer end of the slide-bar, a handle formed integral with the slide-bar, a slide-piece reciprocating on the slide-bar having a central fin on-the rear-side flanked by recesses rounded at the forward ends bearing substantially straight upper and lower walls at the rear open sides thereof, a lower backward extension or offset at the "fin end of the slide-piece, a pivoted jawpiece having a lower backward. extension or oflset pivoted to the fin and adapted to rock upon its pivot pin having a lower face coact ing with the upper face of the offset of the slide-piece to limit the rearward rocking movement thereof, and an adjusting screw lying between the slide-bar and jaw-piece.

6. In a wrench, a slide-bar, a handle formed integral with the slide-bar, a slidepiece reciprocating on the slide-bar having a central fin on the rear-side flanked by recesses rounded at the forward ends bearing substantially straight upper and lower walls at the rear open sides, thereof, a lower back ward extension or offset at the fin end of the slide-piece, and a pivoted jaw-piece having a lower backward extension or offset pivoted to the fin and adapted to rock upon its pivot pin having a lower face coacting with the upper face of the offset of the slide-piece to limit the rearward rocking movement there of, and a bow spring located in a recess formed by abutting chamfers provided in the abutting faces of the offsets of the slide-piece and pivoted aw-piece.

7. In a wrench, a slide-bar, a handle formed integral with the slide-bar, a slidepiece reciprocating on the slide-bar having a central [in on the rear-side flanked by recesses rounded at the forward ends bearing substantially straight upper and lower walls at the rear open sides thereof, a lower backward extension or offset at the fin end of the slide-piece, a pivoted jaw-piece having a lower backward extension or offset pivoted to the fin and adapted to rock upon its pivot pin having a lower face coacting with the upper face of the offset of the slide-piece to limit the rearward rocking movement thereof, an adjusting screw lying between the slide-bar and jaw-piece, and a bow spring located in a recess formed by abutting chainfers provided in the abutting faces of the offsets of the slide-piece and pivoted jawpiece.

S. In a wrench, a slidebar, a aw-head removably secured to the outer end of the slide-bar, a handle-bar, a slide-piece reciproeating on the slide-bar having a central fin on the rear-side flanked by recesses rounded at the forward ends bearing substantially straight upper and lower walls at the rear open sides thereof, a lower backward extension or offset at the fin end of the slide-piece, and a pivoted aw-piece having a lower backward extension or offset pivoted to the fin and adapted to rock upon its pivot pin having a lower face coacting with the upper face of the offset of the slide-piece to limit the rearward rocking movement thereof, and a bow spring located in a recess formed by abutting chamfers provided in the abutting faces of the offsets of the slide-piece and pivoted jawpiece.

9. In a wrench, a slide-bar, a jaw-head removably secured to the outer end of the slidebar, a handle formed integral with the slidebar, a slide-piece reciprocating on the slidebar having a central fin on the rear-side flanked by recesses rounded at the forward ends bearing substantially straight upper and lower walls at the rear open sides thereof, a lower backward extension or offset at the fin end of the slide-piece, a pivoted jaw-piece having a lower backward extension or offset pivoted to the fin and adapted to rock upon its pivot pin having a lower face coacting with the upper face of the offset of the slidepiece to limit the rearward rocking movement thereof, an adjusting screw lying between the slide-bar and jaw-piece, and a bow spring located in a recess formed by abutting chamfers provided in the abutting faces of the offsets of the slide-piece and pivoted jawpiece.

10. In a wrench, a slide-bar formed integral with a handle-piece, a lower aw-head at the end of the slide-bar, a slide-piece or sleeve sliding on the slide-bar havlng a central-fin flanked by chamfers rounded at the inner ends, a pivoted jaw-piece having side- In testimony whereof I have hereunto wings fitting in the chamfers of the slideaffixed my signature in the presence of two piece or sleeve, a, pivotin securing the pivwitnesses. oted-jawiece to the s ide-piece or sleeve, DAVID STEWART. 5 and an ad iusting screw for moving the slide Witnesses:

piece or sleeve back and forth on the slide- EDW'ARD E. KAUFMANN,

A. LAURA STOCK.

bar. 

